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Advisory severityHigh7.8Red Hat Linux

High [CVE-2022-4318 +1] Fix Bypass for CVE-2022-4318 — /etc/passwd Injection via HOME env

This high-severity Red Hat Linux advisory covers CVE-2026-15809 and CVE-2022-4318 affecting Red Hat OpenShift Container Platform 4.12, Red Hat OpenShift Container Platform 4.13, Red Hat OpenShift Container Platform 4.14.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations. This bulletin covers 2 CVEs; its score, affected versions and guidance may apply to different issues within that bulletin.

CVE-2026-15809 Source published Source updated

VulniPulse record published Record updated

CVE-2022-4318CVE-2026-15809
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

A flaw was found in CRI-O. The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed.

An attacker capable of setting environment variables on a container can inject a newline character into the HOME environment variable. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.

This Important flaw in CRI-O allows for arbitrary line injection into a container's `/etc/passwd` file. This risk is present in environments where untrusted users can influence container environment variable settings.

Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-134.

Affected Red Hat products: Red Hat OpenShift Container Platform 4.12; Red Hat OpenShift Container Platform 4.13; Red Hat OpenShift Container Platform 4.14; Red Hat OpenShift Container Platform 4.15; Red Hat OpenShift Container Platform 4.16; Red Hat OpenShift Container Platform 4.17; Red Hat OpenShift Container Platform 4.18; Red Hat OpenShift Container Platform 4.19; Red Hat OpenShift Container Platform 4.20; Red Hat OpenShift Container Platform 4.21; Red Hat OpenShift Container Platform 4.22; Confidential Compute Attestation; Red Hat OpenShift Container Platform 4.

Will not fix / out of support: Red Hat OpenShift Container Platform 4.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Fixed versions
  • cri-o-0:1.25.5-36.rhaos4.12.git2e7f657.el8
  • cri-o-0:1.26.5-32.rhaos4.13.git1088e36.el8
  • cri-o-0:1.27.8-22.rhaos4.14.git0633bf1.el8
  • cri-o-0:1.28.11-17.rhaos4.15.git48e6ddb.el8
  • cri-o-0:1.29.13-14.rhaos4.16.git84cfdc6.el8
  • cri-o-0:1.30.14-13.rhaos4.17.git3a25d98.el8
  • cri-o-0:1.31.13-14.rhaos4.18.gitf2de9ac.el8
  • cri-o-0:1.32.13-11.rhaos4.19.git089e95c.el9
  • cri-o-0:1.33.13-5.rhaos4.20.git7ebc848.el9
  • cri-o-0:1.34.11-4.rhaos4.21.git358c4b4.el9
  • cri-o-0:1.35.6-5.rhaos4.22.git41f610b.el9
  • RHSA-2026:65906
  • RHSA-2026:65838
  • RHSA-2026:67836
  • RHSA-2026:67856
  • RHSA-2026:62548
  • RHSA-2026:70585
  • RHSA-2026:66385
  • RHSA-2026:60452
  • RHSA-2026:60444
  • RHSA-2026:60449
  • RHSA-2026:57361

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Restrict access to users who can create or modify container workloads through appropriate RBAC permissions, apply security controls such as Security Context Constraints (SCCs) to limit privilege escalation, and enforce policies to run containers with reduced privileges (for example, as non-root) to reduce the impact of potential exploitation. Enable SELinux on affected nodes and consider admission controls to prevent potentially unsafe workload configurations.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

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